ML071360223
| ML071360223 | |
| Person / Time | |
|---|---|
| Site: | Dresden, LaSalle  |
| Issue date: | 06/08/2007 |
| From: | Gratton C NRC/NRR/ADRO/DORL/LPLIII-2 |
| To: | Crane C Exelon Generation Co |
| Gratton C, NRR/DORL, 415-1055 | |
| References | |
| GL-06-003, TAC MD1575, TAC MD1576, TAC MD1592, TAC MD1593 | |
| Download: ML071360223 (6) | |
Text
June 8, 2007 Mr. Christopher M. Crane President and Chief Nuclear Officer Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
CLARIFICATION OF THE NUCLEAR REGULATORY COMMISSION STAFFS LETTER ACKNOWLEDGING THE RECEIPT OF EXELON GENERATION COMPANYS RESPONSES TO GENERIC LETTER 2006-03, POTENTIALLY NONCONFORMING HEMYC AND MT FIRE BARRIER CONFIGURATIONS, FOR DRESDEN NUCLEAR PLANT, UNITS 2 AND 3, AND LASALLE COUNTY STATION, UNITS 1 AND 2 (TAC NOS. MD1575, MD1576, MD1592 AND MD1593)
On May 7, 2007, the NRC staff held a conference call with Mr. David Gullott and other members of your staff to clarify the NRC staffs conclusions in letters dated September 18, and November 27, 2006, documenting the receipt of Exelon Generation Company, LLCs (the licensees), responses to Generic Letter (GL) 2006-03, Potentially Nonconforming Hemyc and MT Fire barrier Configurations, for the Dresden Nuclear Power Station, Units 2 and 3 (Dresden), and LaSalle County Station, Units 1 and 2 (LaSalle) (Agencywide Documents Access and Management System (ADAMS) Accession Nos. ML063000065, and ML062300114, respectively). These letters documented the completion of the NRC staffs review of the licensees GL 2006-03 responses and concluded that the 1-or 3-hour fire barrier material that separates safe shutdown trains is located within the same fire area, and is designed and installed in accordance with the current NRC guidance. The licensee requested clarification of the NRC staffs conclusion because certain electrical raceway fire barrier system (ERFBS) configurations at Dresden and LaSalle, although installed in configurations that are acceptable to the NRC staff, would not meet a strict definition of designed and installed in accordance with current NRC guidance.
The NRC staff clarified in the conference call that for the purpose of closing the review of GL 2006-03 responses, licensees meet the current NRC guidance if the ERFBS has either been designed, installed, or evaluated per GL 86-10, Supplement 1, Implementation of Fire Protection Requirements, or had previously been reviewed and approved by the NRC staff in a safety evaluation report or an exemption, provided that the bases for the acceptance of those actions have not changed. The licensee verbally confirmed that the subject ERFBS configurations have not changed since the NRC staffs review and acceptance.
The licensee confirmed during the conference call that, for Dresden, the 3M ERFBS configurations not bounded by fire tests were evaluated under GL 86-10, Supplement 1, and found to be acceptable by the licensee. The NRC staff stated that the documentation for these evaluations is subject to NRC review during inspections and must be available on site.
For LaSalle, NUREG-0519, Safety Evaluation Report Related to the Operation of LaSalle County Station Units 1 and 2, Supplement 2, dated February 1982 (ADAMS Accession
C. Crane No. 8203030262), documented the NRC staffs acceptance of the installed Kaowool configurations that the licensee described in a letter dated November 3, 1981 (ADAMS Accession No. 8111060281).
If you have any further questions regarding the basis for the NRC staffs conclusions for GL 2006-03, please contact me at 301-415-1055.
Sincerely,
/RA/
Christopher Gratton, Senior Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-237, 50-249, 50-373, and 50-374 cc: See next page
C. Crane No. 8203030262), documented the NRC staffs acceptance of the installed Kaowool configurations that the licensee described in a letter dated November 3, 1981 (ADAMS Accession No. 8111060281).
If you have any further questions regarding the basis for the NRC staffs conclusions for GL 2006-03, please contact me at 301-415-1055.
Sincerely,
/RA/
Christopher Gratton, Senior Project Manager Plant Licensing Branch III-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-237, 50-249, 50-373, and 50-374 cc: See next page DISTRIBUTION:
PUBLIC LPL3-2 R/F RidsNrrPMSSands RidsOgcRp RidsAcrsAcnwMailCenter RidsRgn3MailCenter RidsNrrPMJWilliams RidsNrrLAEWhitt RidsNrrDorlDpr RidsNrrDorlLpl3-2 RidsNrrPMCGratton Adams accession No. ML071360223 NRR-106 OFFICE LPL3-2/PM LPL3-2/LA NRR/AFPB/BC OGC LPL3-2/BC NAME CGratton EWhitt SWeerakkody AHodgdon RGibbs DATE 6/5/07 6/5/07 5 /25 /07 6 / 5 /07 6/8/07 OFFICIAL RECORD COPY
LaSalle County Station, Units 1 and 2 cc:
Site Vice President - LaSalle County Station Exelon Generation Company, LLC 2601 North 21st Road Marseilles, IL 61341-9757 Plant Manager - LaSalle County Station Exelon Generation Company, LLC 2601 North 21st Road Marseilles, IL 61341-9757 Manager Regulatory Assurance - LaSalle Exelon Generation Company, LLC 2601 North 21st Road Marseilles, IL 61341-9757 U.S. Nuclear Regulatory Commission LaSalle Resident Inspectors Office 2605 North 21st Road Marseilles, IL 61341-9756 Phillip P. Steptoe, Esquire Sidley and Austin One First National Plaza Chicago, IL 60603 Assistant Attorney General 100 W. Randolph St. Suite 12 Chicago, IL 60601 Chairman LaSalle County Board 707 Etna Road Ottawa, IL 61350 Attorney General 500 S. Second Street Springfield, IL 62701 Chairman Illinois Commerce Commission 527 E. Capitol Avenue, Leland Building Springfield, IL 62706 Robert Cushing, Chief, Public Utilities Division Illinois Attorney General's Office 100 W. Randolph Street Chicago, IL 60601 Regional Administrator, Region III U.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville Road Lisle, IL 60532-4352 Illinois Emergency Management Agency Division of Disaster Assistance &
Preparedness 110 East Adams Street Springfield, IL 62701-1109 Document Control Desk - Licensing Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Senior Vice President - Operations Support Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Director - Licensing and Regulatory Affairs Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Vice President - Regulatory Affairs Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Associate General Counsel Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
LaSalle County Station, Units 1 and 2 cc:
Manager Licensing - Braidwood, Byron, and LaSalle Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Senior Vice President - Midwest Operations Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555
Dresden Nuclear Power Units 2 and 3 cc:
Site Vice President - Dresden Exelon Generation Company, LLC 6500 N. Dresden Road Morris, IL 60450-9765 Plant Manager - Dresden Nuclear Power Station Exelon Generation Company, LLC 6500 N. Dresden Road Morris, IL 60450-9765 Manager Regulatory Assurance - Dresden Exelon Generation Company, LLC 6500 N. Dresden Road Morris, IL 60450-9765 U.S. Nuclear Regulatory Commission Dresden Resident Inspectors Office 6500 N. Dresden Road Morris, IL 60450-9766 Chairman Grundy County Board Administration Building 1320 Union Street Morris, IL 60450 Regional Administrator, Region III U.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville Road Lisle, IL 60532-4352 Illinois Emergency Management Agency Division of Disaster Assistance &
Preparedness 110 East Adams Street Springfield, IL 62701-1109 Document Control Desk - Licensing Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Senior Vice President - Midwest Operations Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Senior Vice President - Operations Support Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Director - Licensing & Regulatory Affairs Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Vice President - Regulatory Affairs Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Associate General Counsel Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555 Manager Licensing - Dresden, Quad Cities, and Clinton Exelon Generation Company, LLC 4300 Winfield Road Warrenville, IL 60555